Workspaces 4 members invites (#8245)

## Summary

  Add team workspace member management and invite system.

## Changes

- Add members panel with role management (owner/admin/member) and member
removal
- Add invite system with email invites, pending invite display, and
revoke functionality
   - Add invite URL loading for accepting invites
  - Add subscription panel updates for member management
  - Add i18n translations for member and invite features

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8245-Workspaces-4-members-invites-2f06d73d36508176b2caf852a1505c4a)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: GitHub Action <action@github.com>

src/platform/auth/workspace/useWorkspaceAuth.test.ts

@@ -26,14 +26,16 @@ vi.mock('@/i18n', () => ({
   t: (key: string) => key
 }))
 
-const mockRemoteConfig = vi.hoisted(() => ({
-  value: {
-    team_workspaces_enabled: true
-  }
-}))
+const mockTeamWorkspacesEnabled = vi.hoisted(() => ({ value: true }))
 
-vi.mock('@/platform/remoteConfig/remoteConfig', () => ({
-  remoteConfig: mockRemoteConfig
+vi.mock('@/composables/useFeatureFlags', () => ({
+  useFeatureFlags: () => ({
+    flags: {
+      get teamWorkspacesEnabled() {
+        return mockTeamWorkspacesEnabled.value
+      }
+    }
+  })
 }))
 
 const mockWorkspace = {
@@ -622,11 +624,11 @@ describe('useWorkspaceAuthStore', () => {
 
   describe('feature flag disabled', () => {
     beforeEach(() => {
-      mockRemoteConfig.value.team_workspaces_enabled = false
+      mockTeamWorkspacesEnabled.value = false
     })
 
     afterEach(() => {
-      mockRemoteConfig.value.team_workspaces_enabled = true
+      mockTeamWorkspacesEnabled.value = true
     })
 
     it('initializeFromSession returns false when flag disabled', () => {